148 lines
5.5 KiB
C++
148 lines
5.5 KiB
C++
/*************************************************************************/
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/* variant_parser.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef VARIANT_PARSER_H
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#define VARIANT_PARSER_H
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#include "core/os/file_access.h"
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#include "core/resource.h"
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#include "core/variant.h"
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class VariantParser {
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public:
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struct Stream {
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virtual CharType get_char() = 0;
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virtual bool is_utf8() const = 0;
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virtual bool is_eof() const = 0;
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CharType saved;
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Stream() :
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saved(0) {}
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virtual ~Stream() {}
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};
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struct StreamFile : public Stream {
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FileAccess *f;
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virtual CharType get_char();
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virtual bool is_utf8() const;
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virtual bool is_eof() const;
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StreamFile() { f = NULL; }
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};
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struct StreamString : public Stream {
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String s;
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int pos;
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virtual CharType get_char();
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virtual bool is_utf8() const;
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virtual bool is_eof() const;
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StreamString() { pos = 0; }
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};
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typedef Error (*ParseResourceFunc)(void *p_self, Stream *p_stream, Ref<Resource> &r_res, int &line, String &r_err_str);
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struct ResourceParser {
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void *userdata;
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ParseResourceFunc func;
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ParseResourceFunc ext_func;
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ParseResourceFunc sub_func;
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};
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enum TokenType {
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TK_CURLY_BRACKET_OPEN,
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TK_CURLY_BRACKET_CLOSE,
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TK_BRACKET_OPEN,
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TK_BRACKET_CLOSE,
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TK_PARENTHESIS_OPEN,
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TK_PARENTHESIS_CLOSE,
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TK_IDENTIFIER,
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TK_STRING,
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TK_NUMBER,
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TK_COLOR,
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TK_COLON,
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TK_COMMA,
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TK_PERIOD,
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TK_EQUAL,
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TK_EOF,
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TK_ERROR,
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TK_MAX
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};
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enum Expecting {
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EXPECT_OBJECT,
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EXPECT_OBJECT_KEY,
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EXPECT_COLON,
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EXPECT_OBJECT_VALUE,
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};
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struct Token {
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TokenType type;
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Variant value;
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};
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struct Tag {
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String name;
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Map<String, Variant> fields;
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};
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private:
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static const char *tk_name[TK_MAX];
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template <class T>
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static Error _parse_construct(Stream *p_stream, Vector<T> &r_construct, int &line, String &r_err_str);
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static Error _parse_enginecfg(Stream *p_stream, Vector<String> &strings, int &line, String &r_err_str);
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static Error _parse_dictionary(Dictionary &object, Stream *p_stream, int &line, String &r_err_str, ResourceParser *p_res_parser = NULL);
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static Error _parse_array(Array &array, Stream *p_stream, int &line, String &r_err_str, ResourceParser *p_res_parser = NULL);
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static Error _parse_tag(Token &token, Stream *p_stream, int &line, String &r_err_str, Tag &r_tag, ResourceParser *p_res_parser = NULL, bool p_simple_tag = false);
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public:
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static Error parse_tag(Stream *p_stream, int &line, String &r_err_str, Tag &r_tag, ResourceParser *p_res_parser = NULL, bool p_simple_tag = false);
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static Error parse_tag_assign_eof(Stream *p_stream, int &line, String &r_err_str, Tag &r_tag, String &r_assign, Variant &r_value, ResourceParser *p_res_parser = NULL, bool p_simple_tag = false);
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static Error parse_value(Token &token, Variant &value, Stream *p_stream, int &line, String &r_err_str, ResourceParser *p_res_parser = NULL);
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static Error get_token(Stream *p_stream, Token &r_token, int &line, String &r_err_str);
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static Error parse(Stream *p_stream, Variant &r_ret, String &r_err_str, int &r_err_line, ResourceParser *p_res_parser = NULL);
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};
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class VariantWriter {
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public:
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typedef Error (*StoreStringFunc)(void *ud, const String &p_string);
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typedef String (*EncodeResourceFunc)(void *ud, const RES &p_resource);
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static Error write(const Variant &p_variant, StoreStringFunc p_store_string_func, void *p_store_string_ud, EncodeResourceFunc p_encode_res_func, void *p_encode_res_ud);
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static Error write_to_string(const Variant &p_variant, String &r_string, EncodeResourceFunc p_encode_res_func = NULL, void *p_encode_res_ud = NULL);
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};
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#endif // VARIANT_PARSER_H
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